Microchip Technology MCP1664 User Manual

MCP1664

LED Driver

Evaluation Board

User’s Guide

 2015 Microchip Technology Inc. DS50002363A

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ISBN: 978-1-63277-376-0

EELOQ, KEELOQ logo, Kleer,

32

logo, RightTouch, SpyNIC,

QUALITY MANAGEMENT S

DS50002363A-page 2  2015 Microchip Technology Inc.

Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
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®

MCUs and dsPIC® DSCs, KEELOQ

®

code hopping

Object of Declaration: MCP1664 LED Driver Evaluation Board

 2015 Microchip Technology Inc. DS50002363A-page 3

MCP1664 LED Driver Evaluation Board User’s Guide

NOTES:

DS50002363A-page 4  2015 Microchip Technology Inc.

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 7

Introduction............................................................................................................ 7

Document Layout .................................................................................................. 7

Conventions Used in this Guide ............................................................................ 8

Recommended Reading........................................................................................ 9

The Microchip Web Site ........................................................................................ 9

Customer Support ................................................................................................. 9

Document Revision History ................................................................................... 9

Chapter 1. Product Overview

1.1 Introduction ................................................................................................... 11

1.2 MCP1664 Short Overview ............................................................................ 11

1.3 What is the MCP1664 LED Driver Evaluation Board? ................................. 12

1.4 Contents of the MCP1664 LED Driver Evaluation Board ............................. 12

Chapter 2. Installation and Operation

2.1 Introduction ................................................................................................... 13

2.2 Features ....................................................................................................... 13

2.3 Getting Started ............................................................................................. 14

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 21

A.2 Board – Schematic ....................................................................................... 22

A.3 Board – Top Silk .......................................................................................... 23

A.4 Board – Top Copper and Silk ....................................................................... 23

A.5 Board – Bottom Copper and Silk ................................................................ 23

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service .................................................................................... 28

 2015 Microchip Technology Inc. DS50002363A-page 5

MCP1664 LED Driver Evaluation Board User’s Guide

NOTES:

DS50002363A-page 6  2015 Microchip Technology Inc.

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.

For the most up-to-date information on development tools, see the MPLAB
Select the Help menu, and then Topics to open a list of available online help files.

®

IDE online help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the
MCP1664 LED Driver Evaluation Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP1664 LED Driver Evaluation Board as a
development tool. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP1664

LED Driver Evaluation Board.

• Chapter 2. “Installation and Operation” – Includes instructions on how to get

started with this user’s guide and a description of the user’s guide.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout

diagrams for the MCP1664 LED Driver Evaluation Board.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the

MCP1664 LED Driver Evaluation Board.

 2015 Microchip Technology Inc. DS50002363A-page 7

MCP1664 LED Driver Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog
A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with
right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe
character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of
digits, R is the radix and n is a
digit.

Filenames autoexec.bat
File paths c:\mcc18\h
Keywords _asm, _endasm, static
Command-line options -Opa+, -Opa-
Bit values 0, 1
Constants 0xFF, ‘A’

Choice of mutually exclusive
arguments; an OR selection

Represents code supplied by
user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options]

errorlevel {0|1}

var_name...]

void main (void)
{ ...
}

®

IDE User’s Guide

DS50002363A-page 8  2015 Microchip Technology Inc.

RECOMMENDED READING

This user's guide describes how to use the MCP1664 LED Driver Evaluation Board.
Other useful documents are listed below. The following Microchip documents are
available and recommended as supplemental reference resources.

• MCP1664 Data Sheet – “High-Voltage Step-Up LED Driver with UVLO and
Open Load Protection” (DS20005408)

This data sheet provides detailed information regarding the MCP1664 LED Driver device.

• MCP1663 Data Sheet – “High-Voltage Integrated Switch PWM Boost
Regulator with UVLO” (DS20006506)

This data sheet provides detailed information about the MCP1663 High-Voltage
Integrated Switch PWM Boost Regulator with UVLO device.

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web site
is used as a means to make files and information easily available to customers. Accessible
by using your favorite Internet browser, the web site contains the following information:

• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing

• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives

Preface

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.

Technical support is available through the web site at:

http://www.microchip.com/support.

DOCUMENT REVISION HISTORY

Revision A (May 2015)

• Initial Release of this Document.

 2015 Microchip Technology Inc. DS50002363A-page 9

MCP1664 LED Driver Evaluation Board User’s Guide

NOTES:

DS50002363A-page 10  2015 Microchip Technology Inc.

Chapter 1. Product Overview

V

IN

GND

V

FB

SW

EN

ON

OFF

C

IN

4.7 - 20 µF

L

4.7µH

R

SET

I

LED

=

0.3V

R

SET

VIN = 2.4V - 5.5V

C

OUT

MCP1664

4.7 - 20 µF

D

1.1 INTRODUCTION

This chapter provides an overview of the MCP1664 LED Driver Evaluation Board and
covers the following topics:

• MCP1664 Short Overview

• What is the MCP1664 LED Driver Evaluation Board?

• Contents of the MCP1664 LED Driver Evaluation Board

1.2 MCP1664 SHORT OVERVIEW

The MCP1664 is a compact, battery-operated, fixed-frequency, step-up DC-DC
converter optimized as LED constant current generator. This product provides an
easy-to-use power supply solution with a minimum number of external components for
applications powered by two-cell or three-cell alkaline, NiCd or NiMH batteries, one-cell
Li-Ion or Li-Polymer batteries.

The MCP1664 is a PWM-only device that operates at a fixed 500 kHz switching
frequency. The device has an operating input voltage range from 2.4V to 5.5V (with an
undervoltage of 2.3V to start and 1.85V to stop). The reference voltage is only 300 mV
in order to minimize the losses on the sense resistor and to increase the overall
efficiency of the application.

The LED can be turned on and off with a variable duty cycle applied to the EN pin for
applications that require current dimming. Compared to its counterpart, the MCP1663
which is designed to be a voltage source, the start-up time for the MCP1664 has been
decreased in order to obtain better performance in dimming applications.

The MCP1664 can supply up to 200 mA of current for a string of four LEDs
(considering a LED Forward Voltage of 3V) from a 3V or higher input voltage source.
More detailed information regarding the current capabilities of the MCP1664 are
available in the data sheet.

In order to provide a compact solution, the device is available in a small 5-Lead SOT-23
and an 8-Lead 2x3 TDFN package.

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

 2015 Microchip Technology Inc. DS50002363A-page 11

FIGURE 1-1: Typical MCP1664 LED Driver in Boost Topology Schematic

MCP1664 LED Driver Evaluation Board User’s Guide

1.3 WHAT IS THE MCP1664 LED DRIVER EVALUATION BOARD?

The MCP1664 LED Driver Evaluation Board is used to evaluate and demonstrate
Microchip Technology’s MCP1664 product. This board demonstrates the MCP1664 in
a boost-converter application supplied from an external voltage source, which drives a
string of LEDs with three selectable currents. The MCP1664 LED Driver Evaluation
Board was developed to help engineers reduce the product design cycle time.

LEDs can be dimmed in two ways:

• Analog dimming: changes LED light output by simply adjusting the value of the
sense resistor and, by doing so, modifying the DC current in the LED string.

• Pulse-width modulation (PWM) dimming: achieves the same effect as analog
dimming by varying the duty cycle of a constant current in the string to effectively
change the average current in the string.

For analog dimming, three output currents can be selected: 90 mA,180 mA and
270 mA. The output current can be changed with a dual switch that changes the
external LED current sense equivalent resistance.

For PWM dimming, a small triangular wave generator was added to the board along
with a variable resistor that sets the duty cycle for the EN pin.

1.4 CONTENTS OF THE MCP1664 LED DRIVER EVALUATION BOARD

This MCP1664 LED Driver Evaluation Board kit includes:

• One MCP1664 LED Driver Evaluation Board unit (ADM00641)

• Important Information Sheet

DS50002363A-page 12  2015 Microchip Technology Inc.

Chapter 2. Installation and Operation

PWM Dimming

Block

(1)

V

IN

GND

V

FB

SW

EN

C

IN

2 x 10 µF

L

1

4.7µH

R

10

R

11

R

12

3.33.33.3

2.4V - 5.5V

Note 1: For PWM Dimming Block refer to Figure 2-4.

D

1

MBRA140

R

3

0

Q

1

Q

2

C

OUT

10 µF

MCP1664

LED

1

LED

2

LED

3

LED

4

2.1 INTRODUCTION

The MCP1664 has been developed for applications that require driving a string of
LEDs from a low-voltage source. The MCP1664 is a non-synchronous step-up
regulator that can operate over a wide output range up to 32V. Its maximum output
current is based on the switch peak current limit (set to 1.8A) and on the maximum
duty cycle of 90%. An important feature is that the device integrates the compensation
and protection circuitry so that the final solution will require a minimum number of
additional components.

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

FIGURE 2-1: MCP1664 LED Driver Boost Converter 90,180,270 mA Constant Current Application.

2.2 FEATURES

The MCP1664 LED Driver Evaluation Board has the following features:

• Input voltage range, V

• Undervoltage lockout: 2.3V to start; 1.85V to stop

• Adjustable output current: 90 mA, 180 mA or 270 mA, selected using a mini dip

• PWM Switching frequency = 500 kHz

• Variable resistor and triangular wave generator on the board that can be used for

• 1.8A peak current limit

 2015 Microchip Technology Inc. DS50002363A-page 13

• Overtemperature protection (if the die temperature exceeds +150°C, 25°C hysteresis)

• Open load protection: if the LED string fails or is disconnected, the converter will

switch on board

PWM dimming

shut down to prevent failure.

: 2.4V to 5.5V, with V

IN

V

IN

OUT

MCP1664 LED Driver Evaluation Board

Power
Supply

-

+

PWM Dimming Block

Analog Ampermeter or Current Probe

Dimming (if R3 resistor is removed)

2.3 GETTING STARTED

The MCP1664 LED Driver Evaluation Board is fully assembled and tested to evaluate and
demonstrate the MCP1664 product. This board requires the use of external lab supplies.

2.3.1 Power Input and Output Connection

2.3.1.1 POWERING THE MCP1664 LED DRIVER EVALUATION BOARD

Soldered test points are available for input voltage connections. The maximum input
voltage should not exceed 5.5V.
The MCP1664 LED Driver Evaluation Board was designed to help the engineer in the
process of validating the device. The package selected for the MCP1664 LED Driver
Evaluation Board is the 5-Lead SOT-23.

2.3.1.2 BOARD POWER-UP PROCEDURE:

1. Connect input supply as shown in Figure 2-2.

2. Using the variable resistor, the duty cycle applied on the EN pin is modified and

PWM dimming is obtained. When turning the variable resistor from one side to
the other, a change in the brightness of the LED can be observed.

3. Change the value of the output current using the Current Select Switch. There

are three available currents: 90 mA,180 mA and 270 mA. When modifying the
value of the sense resistor, a change in the brightness of the LED can be noticed.

Additional test points are available for visualizing different signals: SW node, output
current (by removing the R

between the CS and VOUT test points), FB node, the triangular signal or the PWM
signal applied on the EN pin.

resistor and using an ampermeter or a current probe

3

FIGURE 2-2: MCP1664 LED Driver Evaluation Board Setup.

DS50002363A-page 14  2015 Microchip Technology Inc.

Installation and Operation

Where:

V

FB

= 0.300V

I

LED

= output LED current

R

SENSE

V

FB

I

LED

------------- -=

2.3.1.3 ADJUSTING LED CURRENT BY RECALCULATING THE SENSE
RESISTOR (ANALOG DIMMING)

The sense resistor is used to modify the value of the output current. The value for the
resistor can be calculated using the following equation:

EQUATION 2-1: SENSE RESISTOR CALCULATION

Note: If the sense resistor is recalculated, the switch used for current selecting will

not be used, as it will add a resistor in parallel with the calculated compo­nent and the value of the current will be different than the one specified in
the User Guide.

Figure 2-3 shows the maximum output current for four LEDs:

FIGURE 2-3: Maximum Output Current vs. Input Voltage.

For the MCP1664 LED Driver Evaluation Board, if the current select switch is set to
90 mA, the input voltage range varies from 2.4V to 5.5V; when the current select
switch is set to 180 mA, the input voltage range is from 3V to 5.5V; when the current
select switch is set to 270 mA, the input voltage range runs from 4.5V to 5.5V

 2015 Microchip Technology Inc. DS50002363A-page 15

MCP1664 LED Driver Evaluation Board

4

11

3

2

1

11

4

U2A

MCP6004

4

11

U2C

MCP6004

Triangular wave output

PWM output

R

5

R

6

4.7 k

1.8 k

2k

R

7

C

6

C

2

C

7

C

1

10 k

10 k

R

1

0.1 µF

0.47 µF

R

4

R

2

10 k

0.1 µF

0.1 µF

V

DD

V

DD

6

5

MCP6004

7

U2B

V

DD

V

DD

V

DD

9

10

8

V

DD

f

R

2

4R1R4C

2

------------------------ -=

2.3.1.4 PWM DIMMING BLOCK

The MCP1664 allows PWM dimming by turning on and off the LED with a PWM signal
applied to the EN pin. The maximum frequency for dimming is limited by the start-up
and the load. By varying the duty cycle of the PWM signal applied on the EN pin, the
LED current changes linearly.

In order to test this feature, a small variable PWM generator, created using three
operational amplifiers from a single quad-op-amp chip, was included on the board.

FIGURE 2-4: PWM Dimming Block.

The circuit consists of a triangular wave generator which is made up of U2B
(functioning as an integrator), U2A (acting as a comparator with hysteresis) and a
comparator (U2C). U2B non-inverting input is biased at V

DD

/2.

A virtual connection between the inverting and non-inverting inputs allows a constant
current through R1 equal to I = VDD/(2R1) which charges the capacitor C2. This way,

the U2B integrator output increases linearly with time. When it reaches 95% V
comparator output changes to its maximum output voltage V

DD

.

At that point, the output voltage of the integrator decreases linearly. When it reaches
5% VDD, the comparator output voltage switches to zero and the cycle repeats. Thus,

the integrator output is a triangular wave that swings between the levels of 5% and
95% V

U2C compares the triangular wave against the DC level given by the R
resistor. Its output is a square wave, with a duty cycle that varies from 0% to 100%.

DS50002363A-page 16  2015 Microchip Technology Inc.

The frequency of the PWM signal is determined by R

EQUATION 2-2: PWM DIMMING FREQUENCY

.

DD

variable

7

, C2, R2 and R4:

1

DD

, the

Installation and Operation

V

THVTL

–

R

4

R

2

------ V
DD

=

Where: R

4<R2

REFERENCE
VOLTAGE

DIMMING
SIGNAL

TRIANGULAR
WAVE

The R1 and R2 resistors affect not only the operating frequency but also the amplitude
of the triangular wave. Considering the maximum voltage of the triangular waves

(V

) and the minimum voltage of the triangular waves (VTL), the amplitude swing and

TH

the threshold voltages can be calculated by means of the following equation:

EQUATION 2-3: TRIANGULAR WAVE AMPLITUDE SWING

For the MCP1664 LED Driver Evaluation Board, the components were chosen so that
they feature a PWM Dimming frequency of 125 Hz and an amplitude swing from
5% V

to 95% V

DD

DD.

FIGURE 2-5: Obtaining the Dimming Signal - 84% Duty Cycle.

 2015 Microchip Technology Inc. DS50002363A-page 17

MCP1664 LED Driver Evaluation Board

REFERENCE
VOLTAGE

DIMMING
SIGNAL

TRIANGULAR
WAVE

LED
CURRENT

DIMMING
SIGNAL

SWITCH
SIGNAL

FIGURE 2-6: Obtaining the Dimming Signal - 27%.

FIGURE 2-7: Dimming Results - V

DS50002363A-page 18  2015 Microchip Technology Inc.

= 4.5V, I

IN

LED_SET

= 90 mA, DUTY = 27%.

Installation and Operation

LED
CURRENT

DIMMING
SIGNAL

SWITCH
SIGNAL

FIGURE 2-8: DIMMING results - VIN= 4.5V, I

LED_SET

= 90 mA, DUTY = 71%

 2015 Microchip Technology Inc. DS50002363A-page 19

MCP1664 LED Driver Evaluation Board

NOTES:

DS50002363A-page 20  2015 Microchip Technology Inc.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP1664 LED
Driver Evaluation Board:

• Board – Schematic

• Board – Top Silk

• Board – Top Copper and Silk

• Board – Bottom Copper and Silk

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

 2015 Microchip Technology Inc. DS50002363A-page 21

DS50002363A-page 22  2015 Microchip Technology Inc.

SW

1

GND

2

FB

3

VIN

5

EN

4

U1

MCP1664

GND

GND

GNDGND

1

J1

1

J2

10uF

C3

10uF

C4

VIN

GND

+A

3

-A

2

OUTA

1

VSS

11

VDD

4

U2A

+B

5

-B

6

OUTB

7

VSS

11

VDD

4

U2B

+C

10

-C

9

OUTC

8

VSS

11

VDD

4

U2C

+D

12

-D

13

OUTD

14

VSS

11

VDD

4

U2D

VDD

VDD

VDD

VDD

GND

GND

GND

10k
0603
1%

R6

GND

VDD

0.47uF

6.3V
0603

C2

0.1uF
16V
0603

C6

GND

2k
0603
1%

R2

4.7k
0603
5%

R1

2

1 3

10k
3386F
10%

R7

VDD

GND

0.1uF
16V
0603

C7

GND

DIMMING

DIMMING

GND

GND

VDD

TP2

TP1

TP4

TP3

TP5

TP7

GND

0.1uF
16V
0603

C1

VDD

GND

TP10

TP6

1.8k
0603
1%

R4

TP8 TP9

1 4

2 3

DIP 2 SPST

SW1

VDD

DIM1

DIM2

10k
0603
1%

R5

GNDGND

10k
0603
1%

R8

GND

10k
0603
1%

R9

GND

DIM1DIM2

SW1

S

VDD

2

GNDGND

10k

0603

%

R8

GND

10k

0603

1%

R9

G

DIM1

DIM2

ANALOG DIMMING

3

2

1

-A

OUTA

VSS

VDD

2A

5

6

7

OUTB

VSS

VDD

9

8

+C

C

OUTC

VSS

VDD

OUTD

VSS

1

VDD

VDD

VDD

VDD

GND

GND

GND

0603

R6

R

G

V

0

6.3V

0603

C20.1

0603

C6

G

2k

0603

4.7k

0603

%

3386F

%

V

G

0.1uF

0603

G

D

G

G

G

VDD

5

G

0.1

0603

C

V

G

10

6

0603

0603

R5

R

PWM DIMMING

SW

GND

2

3

VIN

5

EN

4

1

M

4

GNDGND

G

F

C3uFC

VDD

D

G

TP4

3

8

TP9

POWER TRAIN

MBRA140T3G

D1

10uF
50V
1210

C5

3

1

2

DMN2050L-7

Q1

3

1

2

DMN2050L-7

Q2

EP

WHITE

LD1

EP

WHITE

LD2

EP

WHITE

LD3

EP

WHITE

LD4

HEATSINK1

HEATSINK2

HEATSINK3

HEATSINK4

4.7uH

L1

0R
1206

R3

3.3R
0805
1%

R12

3.3R
0805
1%

R11

3.3R
0805
1%

R10

MCP1664 LED Driver Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

TP

IMMIN

4

u

U

CP166

ND

TP

R2

5

.47uF

DD

-

U2B

P

4

U

DD

1

uF

ND

%

ND

TP

DIP 2 SPST

IM1IM

1

ND

uF

DD

ND

R

TP

10

-

C7

U2C

IMMIN

1

ND

U2D

1

ND

TP

ND

ND

ND

A.3 BOARD – TOP SILK

A.4 BOARD – TOP COPPER AND SILK

Schematic and Layouts

A.5 BOARD – BOTTOM COPPER AND SILK

 2015 Microchip Technology Inc. DS50002363A-page 23

MCP1664 LED Driver Evaluation Board User’s Guide

NOTES:

DS50002363A-page 24  2015 Microchip Technology Inc.

MCP1664 LED DRIVER

EVALUATION BOARD

USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty. Reference Description Manufacturer Part Number

3 C1, C6, C7 Cap. ceramic 0.1 µF 16V 10% X7R SMD

0603

1 C2 Cap. ceramic 0.47 µF 6.3V 10% X5R

SMD 0603

2 C3, C4 Cap. ceramic 10 µF 10V 10% X7R SMD

0805

1 C5 Cap. ceramic 10 µF 50V 20% X7R SMD

1210

1 D1 Diode Schottky MBRA140T3G 505 mV

1A 40V DO-214AC_SMA

2 J1, J2 Conn. TP Loop Tin SMD Harwin Inc. S1751-46R

1 L1 Inductor 4.7 µH 3.16A 20% SMD

L7.3W7.3H4.5

4 LD1, LD2,

LD3, LD4

2 Q1, Q2 Trans. FET N-CH DMN2050L-7 20V 5.9A

1 PCB Printed Circuit Board – MCP1664 LED

1 R1 Res. TKF 4.7k 5% 1/10W SMD 0603 Panasonic® - ECG ERJ-3GEYJ472V

Diode LED White 3.2V 700 mA 95lm
2700K SMD L3.45W3.45H2.2

1.4W SOT-23-3

Driver Evaluation Board

AVX Corporation 0603YC104KAT2A

—

®

GRM188R60J474KA01D

®

MBRA140T3G

04-10371

Murata Electronics

Murata Electronics GRM21BR71A106KE51L

Taiyo Yuden Co., Ltd. UMK325AB7106MM-T

ON Semiconductor

Würth Elektronik 7447779004

Würth Elektronik 158353027

®

Diodes

Incorporated DMN2050L-7

1 R2 Res. TKF 2k 1% 1/10W SMD 0603 Panasonic - ECG ERJ-3EKF2001V

1 R3 Res. TKF 0R SMD 1206 KOA Speer Electronics,

Inc.

1 R4 Res. TKF 1.8k 1% 1/10W SMD 0603 Panasonic - ECG ERJ-3EKF1801V

4 R5, R6, R8, R9Res. TF 10k 1% 1/16W SMD 0603 TE Connectivity, Ltd. 5-1879337-9

1 R7 Res. Trimmer Cermet 10k 10% 500 mW

TH 3386F

3 R10, R11,

R12

1 SW1 Switch DIP 2 SPST 24V 25 mA

1 TP1 Conn. TP Loop Red TH Keystone Electronics

3 TP2, TP6,

TP10

6TP3, TP4,

TP5, TP7,
TP8, TP9

Res. TKF 3.3R 1% 1/8W SMD 0805 Vishay/Dale CRCW08053R30FKEA

418121270802 SMD

Conn. TP Loop Black TH Keystone Electronics

Conn. TP Loop Orange TH Keystone Electronics

Bourns®, Inc. 3386F-1-103T

Würth Elektronik 418121270802

Corp.

Corp.

Corp.

RK73Z2BTTD

5010

5011

5013

Note: The components listed in this Bill of Materials are representative of the PCB assembly. The

released BOM used in manufacturing uses all RoHS-compliant components

 2015 Microchip Technology Inc. DS50002363A-page 25

MCP1664 LED Driver Evaluation Board

TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED)

Qty. Reference Description Manufacturer Part Number

1 U1 MCHP Analog Switcher Boost LED

Driver 32V

1 U2 MCHP Analog Op Amp 4-Ch 1 MHz

MCP6004T-E/ST TSSOP-14

4 BUMPER CYLIN 0.312” DIA BLK 3M SJ61A11

1 Heat Sink for SMD, 22°C/W Fischer Elektronik CK SMD B 19 SA

1 Thermal tape, Adhesive 0.85 W/M.K Amec Thermasol FCTS73-10N1

Note: The components listed in this Bill of Materials are representative of the PCB assembly. The

released BOM used in manufacturing uses all RoHS-compliant components

Microchip Technology Inc. MCP1664T-E/OT

Microchip Technology Inc.

MCP6004-E/ST

DS50002363A-page 26  2015 Microchip Technology Inc.

NOTES:

MCP1664 LED Driver Evaluation Board

 2015 Microchip Technology Inc. DS50002363A-page 27

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01/27/15

DS50002363A-page 28  2015 Microchip Technology Inc.

Mouser Electronics

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